'use client';

import { useEffect, useRef, useState } from 'react';
import { SkinViewer as SkinViewer3D, WalkingAnimation, RunningAnimation, FlyingAnimation, IdleAnimation } from 'skinview3d';

interface SkinViewerProps {
  skinUrl: string;
  capeUrl?: string;
  isSlim?: boolean;
  width?: number;
  height?: number;
  className?: string;
  autoRotate?: boolean;
  walking?: boolean;
  running?: boolean; // 新增：跑步动画
  jumping?: boolean; // 新增：跳跃动画
  rotation?: boolean; // 新增：旋转控制
  isExternalPreview?: boolean; // 新增：是否为外部预览
}

export default function SkinViewer({
  skinUrl,
  capeUrl,
  isSlim = false,
  width = 300,
  height = 300,
  className = '',
  autoRotate = true,
  walking = false,
  running = false,
  jumping = false,
  rotation = true,
  isExternalPreview = false, // 新增：默认为false
}: SkinViewerProps) {
  const canvasRef = useRef<HTMLCanvasElement>(null);
  const viewerRef = useRef<SkinViewer3D | null>(null);
  const [isLoading, setIsLoading] = useState(true);
  const [hasError, setHasError] = useState(false);
  const [imageLoaded, setImageLoaded] = useState(false);

  // 预加载皮肤图片以检查是否可访问
  useEffect(() => {
    if (!skinUrl) return;

    setIsLoading(true);
    setHasError(false);
    setImageLoaded(false);

    const img = new Image();
    img.crossOrigin = 'anonymous'; // 尝试跨域访问
    
    img.onload = () => {
      console.log('皮肤图片加载成功:', skinUrl);
      setImageLoaded(true);
      setIsLoading(false);
    };
    
    img.onerror = (error) => {
      console.error('皮肤图片加载失败:', skinUrl, error);
      setHasError(true);
      setIsLoading(false);
    };

    // 开始加载图片
    img.src = skinUrl;

    return () => {
      // 清理
      img.onload = null;
      img.onerror = null;
    };
  }, [skinUrl]);

  // 初始化3D查看器
  useEffect(() => {
    if (!canvasRef.current || !imageLoaded || hasError) return;

    try {
      console.log('初始化3D皮肤查看器:', { skinUrl, isSlim, width, height });
      
      // 使用canvas的实际尺寸，参考blessingskin
      const canvas = canvasRef.current;
      const viewer = new SkinViewer3D({
        canvas: canvas,
        width: canvas.clientWidth || width,
        height: canvas.clientHeight || height,
        skin: skinUrl,
        cape: capeUrl,
        model: isSlim ? 'slim' : 'default',
        zoom: 1.0, // 使用blessingskin的zoom方式
      });

      viewerRef.current = viewer;

      // 设置背景和控制选项 - 参考blessingskin
      viewer.background = null; // 透明背景
      viewer.autoRotate = false; // 完全禁用自动旋转
      
      // 外部预览时禁用所有动画和旋转
      if (isExternalPreview) {
        viewer.autoRotate = false;
        viewer.controls.enableRotate = false; // 禁用旋转控制
        viewer.controls.enableZoom = false;   // 禁用缩放
      } else {
        viewer.autoRotate = autoRotate && !walking && !running && !jumping;
        viewer.controls.enableRotate = rotation; // 根据参数控制旋转
        viewer.controls.enableZoom = true;   // 启用缩放
      }
      
      viewer.controls.enablePan = false;    // 禁用平移

      console.log('3D皮肤查看器初始化成功');

    } catch (error) {
      console.error('3D皮肤查看器初始化失败:', error);
      setHasError(true);
    }

    // 清理函数
    return () => {
      if (viewerRef.current) {
        try {
          viewerRef.current.dispose();
          viewerRef.current = null;
          console.log('3D皮肤查看器已清理');
        } catch (error) {
          console.error('清理3D皮肤查看器失败:', error);
        }
      }
    };
  }, [skinUrl, capeUrl, isSlim, width, height, autoRotate, walking, running, jumping, rotation, imageLoaded, hasError, isExternalPreview]);

  // 控制动画效果 - 参考 Blessing Skin 的实现
  useEffect(() => {
    if (!viewerRef.current) return;

    const viewer = viewerRef.current;
    
    // 外部预览时只使用静止动画，禁用所有其他动画
    if (isExternalPreview) {
      viewer.animation = new IdleAnimation();
      viewer.autoRotate = false;
      console.log('外部预览模式：启用静止动画，禁用旋转');
    } else {
      // 根据优先级设置动画 - 参考 Blessing Skin 的 animationFactories
      if (running) {
        // 跑步动画
        viewer.animation = new RunningAnimation();
        console.log('启用跑步动画');
      } else if (walking) {
        // 普通步行动画
        viewer.animation = new WalkingAnimation();
        console.log('启用步行动画');
      } else if (jumping) {
        // 飞行动画作为跳跃
        viewer.animation = new FlyingAnimation();
        console.log('启用跳跃动画');
      } else {
        // 静止动画
        viewer.animation = new IdleAnimation();
        console.log('启用静止动画');
      }
      
      // 更新自动旋转状态
      viewer.autoRotate = autoRotate && !walking && !running && !jumping;
    }
    
  }, [walking, running, jumping, autoRotate, isExternalPreview]);

  // 当皮肤URL改变时更新
  useEffect(() => {
    if (viewerRef.current && skinUrl && imageLoaded) {
      try {
        console.log('更新皮肤URL:', skinUrl);
        viewerRef.current.loadSkin(skinUrl);
      } catch (error) {
        console.error('更新皮肤失败:', error);
      }
    }
  }, [skinUrl, imageLoaded]);

  // 监听容器尺寸变化并调整viewer大小 - 参考blessingskin
  useEffect(() => {
    if (viewerRef.current && canvasRef.current) {
      const rect = canvasRef.current.getBoundingClientRect();
      viewerRef.current.setSize(rect.width, rect.height);
    }
  }, [imageLoaded]); // 当图片加载完成后调整尺寸

  // 当披风URL改变时更新
  useEffect(() => {
    if (viewerRef.current && capeUrl && imageLoaded) {
      try {
        console.log('更新披风URL:', capeUrl);
        viewerRef.current.loadCape(capeUrl);
      } catch (error) {
        console.error('更新披风失败:', error);
      }
    } else if (viewerRef.current && !capeUrl && imageLoaded) {
      try {
        viewerRef.current.resetCape();
      } catch (error) {
        console.error('移除披风失败:', error);
      }
    }
  }, [capeUrl, imageLoaded]);

  // 当模型类型改变时更新
  useEffect(() => {
    if (viewerRef.current && skinUrl && imageLoaded) {
      try {
        console.log('更新模型类型:', isSlim ? 'slim' : 'default');
        viewerRef.current.loadSkin(skinUrl, { model: isSlim ? 'slim' : 'default' });
      } catch (error) {
        console.error('更新模型失败:', error);
      }
    }
  }, [isSlim, skinUrl, imageLoaded]);

  // 错误状态显示
  if (hasError) {
    return (
      <div 
        className={`${className} flex items-center justify-center bg-gradient-to-br from-red-50 to-orange-50 dark:from-red-900/20 dark:to-orange-900/20 rounded-xl border-2 border-dashed border-red-300 dark:border-red-700`}
        style={{ width: width, height: height }}
      >
        <div className="text-center p-4">
          <div className="text-4xl mb-2">⚠️</div>
          <div className="text-sm text-red-600 dark:text-red-400 font-medium mb-1">
            皮肤加载失败
          </div>
          <div className="text-xs text-red-500 dark:text-red-500">
            图片链接可能无效或存在访问限制
          </div>
        </div>
      </div>
    );
  }

  // 加载状态显示
  if (isLoading) {
    return (
      <div 
        className={`${className} flex items-center justify-center bg-gradient-to-br from-orange-50 to-amber-50 dark:from-gray-700 dark:to-gray-600 rounded-xl`}
        style={{ width: width, height: height }}
      >
        <div className="text-center">
          <div className="animate-spin w-8 h-8 border-3 border-orange-500 border-t-transparent rounded-full mx-auto mb-3"></div>
          <div className="text-sm text-orange-600 dark:text-orange-400 font-medium">
            加载中...
          </div>
        </div>
      </div>
    );
  }

  return (
    <canvas
      ref={canvasRef}
      className={className}
      style={{ 
        display: 'flex', 
        justifyContent: 'center', 
        alignItems: 'center',
        width: '100%', 
        height: '100%' 
      }}
    />
  );
}